High-efficiency energy-saving double-fan group gas heating drying equipment

Abstract

The utility model discloses a kind of high-efficiency energy-saving double-fan unit gas heating drying equipment, including double-fan unit air supply system, gas premix burner, circulating conveying air duct, combustion chamber and heating space, double-fan unit air supply system includes two groups of high-pressure centrifugal fan and air inlet pipeline, gas premix burner is installed on combustion chamber, circulating conveying air duct is set at the bottom of heating space, circulating conveying air duct is communicated with combustion chamber by two corresponding air inlet pipeline, circulating conveying air duct is provided with multiple air outlet ports at the bottom of heating space, heating air is injected into combustion chamber by air outlet port, the top of combustion chamber is provided with air return, air return is communicated with the inside of combustion chamber by air return pipeline being set on the top of double-fan unit air supply system, in general, the utility model has the advantages that heat diffusion speed is fast, temperature rising time is short, heat loss is less, realizes dynamic energy-saving regulation, air is evenly distributed in heating space and equipment service life is long.

Description

Technical Field

[0001] This utility model belongs to the technical field of industrial gas heating equipment, specifically relating to a high-efficiency and energy-saving dual-fan unit gas heating and drying equipment. Background Technology

[0002] Industrial gas heating equipment refers to a type of thermal equipment that uses gaseous fuels such as natural gas, liquefied petroleum gas (LPG), coal gas, and biogas as energy sources. It converts chemical energy into thermal energy through combustion and is used for heating, smelting, drying, and heat treatment of materials in industrial production processes. Due to its advantages such as high thermal efficiency, fast heating speed, easy temperature control, and relatively low cost, it remains the mainstream heating method in many industrial fields, especially in areas covered by natural gas pipelines, where its cleanliness is far superior to coal and heavy oil. However, in some large-scale installations, gas heating equipment currently fails to meet the requirements of rapid heating and energy saving. This is because traditional burners often result in insufficient mixing, leading to low combustion efficiency and significant gas waste. Furthermore, existing gas heating equipment generally uses single-fan units for air supply, resulting in insufficient airflow. Especially in large heating environments, uneven temperature distribution frequently occurs, affecting stability. Additionally, the combustion method of existing gas heating equipment is still traditional open combustion, leading to rapid heat loss, high gas consumption, and low energy utilization. Finally, the metal casing of these gas heating equipment is prone to rusting when exposed to high temperature and humidity for extended periods, and is susceptible to deformation after prolonged high-temperature operation, causing sealing problems and reducing equipment lifespan.

[0003] To address these issues, we propose a high-efficiency and energy-saving dual-fan gas-fired heating and drying equipment, which solves the problems of slow heating speed, uneven temperature, severe heat loss, low energy utilization, poor equipment durability, and short service life that exist in current applications. Utility Model Content

[0004] In view of this, this utility model proposes a high-efficiency and energy-saving dual-fan gas heating and drying equipment, which is applied to the field of industrial gas heating equipment technology. It is mainly used in scenarios that require rapid heating and energy saving, such as large-scale drying, livestock shed drying and heating, and factory heating. It solves the existing technical problems of slow heating speed, uneven temperature, serious heat loss, low energy utilization rate, poor equipment durability and short service life.

[0005] To achieve the above-mentioned technical objectives, the specific technical solution adopted by this utility model is as follows: A high-efficiency and energy-saving dual-fan unit gas heating and drying equipment includes a dual-fan unit air supply system, a gas premixed burner, a circulating conveying air duct, a combustion chamber, and a heating space. The dual-fan unit air supply system includes two sets of high-pressure centrifugal fans and air inlet pipes connected to the corresponding high-pressure centrifugal fans. Both the high-pressure centrifugal fans and the combustion chamber are located outside the heating space. The two sets of high-pressure centrifugal fans are connected to the interior of the combustion chamber. The high-pressure centrifugal fans deliver heated air from the combustion chamber to the interior of the heating space through high-speed air supply. The gas premixed burner is installed on the combustion chamber. The circulating conveying air duct is located at the bottom of the heating space and is connected to the combustion chamber through two corresponding air inlet pipes. The circulating conveying air duct is equipped with multiple air inlets located at the bottom of the heating space to inject heated air into the combustion chamber. A return air inlet is located above the combustion chamber and is connected to the interior of the combustion chamber through a return air duct located above the dual-fan unit air supply system.

[0006] Furthermore, both the high-pressure centrifugal fan and the combustion chamber are equipped with corrosion-resistant outer shells, which are assembled from multiple quick-release plates with a double-layer sheet metal structure.

[0007] Furthermore, the gas-air premixed burner is connected to a multi-hole injection flame stabilization mechanism, which is located on the inner wall of the combustion chamber and injects flames into the interior of the combustion chamber.

[0008] Furthermore, the outer ring of the circulating air duct surrounds the bottom of the combustion chamber, and multiple air inlets are evenly distributed in the part of the circulating air duct surrounding the bottom of the combustion chamber. The diameter of the air inlets is set according to the air volume and pressure to ensure that the temperature of each air inlet is uniform.

[0009] Furthermore, each quick-release plate includes an outer electrostatic powder coating layer, a middle rock wool filling layer, and an inner galvanized layer.

[0010] Furthermore, the high-pressure centrifugal fan and the combustion chamber are both located inside the same corrosion-resistant shell. Multiple long heat dissipation holes are provided on the bottom of the corrosion-resistant shell to facilitate internal heat dissipation. The long heat dissipation holes are arranged in multiple rows and are evenly distributed around the bottom of the corrosion-resistant shell. The bottom of the corrosion-resistant shell is supported by support legs.

[0011] Furthermore, the top of the return air duct bends at a right angle towards the top of the heating space in the horizontal direction. The return air inlet is located above the two circulating air ducts. The bottom of the return air duct extends vertically downward into the interior of the anti-corrosion shell. The bottoms of the two air inlet ducts are both vertically downward, and the tops of the two air inlet ducts bend in an arc towards the combustion chamber. The tops of the two air inlet ducts pass through the side wall of the heating space and penetrate into the interior of the anti-corrosion shell.

[0012] Furthermore, the circulating air duct includes two air distribution pipes located at the outer ends of the two sides of the heating space, two support pipes located on the inner side of the space, and three conveying pipes connecting the air distribution pipes and the support pipes. The three conveying pipes are all perpendicular to the air distribution pipes and the support pipes. Two of the conveying pipes are located at the outer ends of the heating space in the longitudinal direction, and the remaining conveying pipe is located in the middle of the heating space. The air distribution outlets are all set on the inner sidewalls of the air distribution pipes, and the multiple air distribution outlets are evenly distributed along the horizontal direction on the corresponding air distribution pipes.

[0013] By adopting the above technical solution, this utility model can also bring the following beneficial effects: 1. This utility model discloses a high-efficiency and energy-saving dual-fan gas heating and drying equipment. By setting a high-pressure centrifugal fan and maintaining an air volume of ≥17800m³ / h, it is responsible for high-speed air delivery, ensuring rapid heat diffusion. This is achieved through a gas-air premixed burner, where the gas and air are fully mixed before combustion, resulting in a combustion efficiency of ≥95% and ensuring CO emissions are below 50ppm. The multi-hole injection flame stabilization structure prevents flameout or backfire, and the flame temperature is stabilized at 1100℃~1300℃, improving the combustion effect in the combustion chamber and increasing the overall working efficiency of the gas heating and drying equipment. It has the advantages of fast heat expansion, high heating and drying efficiency, high gas utilization efficiency, and good combustion effect in the combustion chamber.

[0014] 2. This utility model discloses a high-efficiency and energy-saving dual-fan gas heating and drying equipment. It connects the circulating air duct and the combustion chamber via an air inlet duct. The circulating air duct and multiple air outlets located at the bottom of the heating space ensure that the heated gas is evenly and rapidly dispersed into the heating space, maintaining uniform airflow from the air outlets to complete the heating and drying process. Air is returned to the combustion chamber for reheating via a return air inlet and return air duct, eliminating the need for exhaust to the outside. This maintains constant pressure in the space while reducing heat loss. The double-layer sheet metal structure of the corrosion-resistant outer shell provides high-temperature resistance and corrosion protection, extending the equipment's service life. The modular installation of the corrosion-resistant outer shell via a quick-release plate facilitates disassembly and cleaning. It boasts advantages such as high internal circulation return air efficiency, low heat loss, uniform air distribution within the heating space, maintaining constant pressure, high heat dissipation of the outer shell, easy disassembly of the outer shell, and long service life. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a high-efficiency and energy-saving dual-fan unit gas heating and drying equipment mentioned in this utility model; Figure 2 This is a schematic diagram of the connection structure between the return air duct and the heating space in this embodiment; Figure 3 This is a schematic diagram of the connection structure between the air inlet duct and the circulating air conveying duct in this embodiment; Figure 4 This is a schematic diagram of the connection structure between the air inlet and the circulating air duct in this embodiment; Figure 5 This is a schematic diagram of the connection structure between the heat dissipation through hole and the corrosion-resistant outer shell in this embodiment; In the diagram: 1. Circulating air duct; 2. Heating space; 3. Air inlet duct; 4. Air outlet; 5. Air return outlet; 6. Air return duct; 7. Corrosion-resistant outer shell; 8. Heat dissipation through hole; 9. Support leg; 10. Air outlet duct; 11. Support duct; 12. Conveying duct. Detailed Implementation

[0017] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0018] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. This utility model can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this invention, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionalities besides one or more of the aspects set forth herein.

[0020] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0021] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details. Example 1

[0022] like Figures 1 to 5 As shown, this utility model discloses a high-efficiency and energy-saving dual-fan unit gas heating and drying equipment, including a dual-fan unit air supply system, a gas premixed burner, a circulating air duct 1, a combustion chamber, and a heating space 2. The dual-fan unit air supply system includes two sets of high-pressure centrifugal fans and air inlet ducts 3 connected to the corresponding high-pressure centrifugal fans. Both the high-pressure centrifugal fans and the combustion chamber are located outside the heating space 2. The two sets of high-pressure centrifugal fans are connected to the interior of the combustion chamber. The high-pressure centrifugal fans deliver heated air from the combustion chamber to the interior of the heating space 2 through high-speed air delivery. The gas premixed burner is installed on the combustion chamber, circulating... The circulating air duct 1 is located at the bottom of the heating space 2. The circulating air duct 1 is connected to the combustion chamber through two corresponding air inlet pipes 3. The circulating air duct 1 is provided with multiple air inlets 4 located at the bottom of the heating space 2. Heated air is injected into the combustion chamber through the air inlets 4. The combustion chamber is provided with a return air inlet 5 above it. The return air inlet 5 is connected to the interior of the combustion chamber through a return air pipe 6 located above the dual-fan unit air supply system. The gas-air premixed burner is connected to a multi-hole injection flame stabilization mechanism. The multi-hole injection flame stabilization mechanism is located on the inner wall of the combustion chamber. Flame is injected into the interior of the combustion chamber through the multi-hole injection flame stabilization mechanism.

[0023] Both the high-pressure centrifugal fan and the combustion chamber are equipped with corrosion-resistant outer shells 7. These shells 7 are assembled from multiple quick-release plates with a double-layer sheet metal structure. Each quick-release plate includes an outer electrostatic powder coating layer, a middle rock wool filling layer, and an inner galvanized layer. The high-pressure centrifugal fan and the combustion chamber are located inside the same corrosion-resistant outer shell 7. The bottom of the corrosion-resistant outer shell 7 has multiple long heat dissipation holes 8 to facilitate internal heat dissipation. These holes are arranged in multiple rows, evenly distributed around the bottom of the corrosion-resistant outer shell 7. The bottom of the corrosion-resistant outer shell 7 is supported by bracket legs 9.

[0024] The outer ring of the circulating air duct 1 surrounds the bottom of the combustion chamber. Multiple air inlets 4 are evenly distributed on the portion of the circulating air duct 1 surrounding the bottom of the combustion chamber. The diameter of the air inlets 4 is set according to the air volume and pressure to ensure uniform temperature at each air inlet 4. The circulating air duct 1 includes two air inlets 10 located at the outer ends of the two sides of the heating space 2, two support pipes 11 located on the inner side of the side, and three conveying pipes 12 connecting the air inlets 10 and the support pipes 11. The three conveying pipes 12 are all perpendicular to the air inlets 10 and the support pipes 11. Two of the conveying pipes 12 are located at the outer ends of the longitudinal direction of the heating space 2, and the remaining conveying pipe 12 is located in the middle of the heating space 2. The air inlets 4 are all set on the inner sidewalls of the air inlets 10, and the multiple air inlets 4 are evenly distributed along the horizontal direction on the corresponding air inlets 10.

[0025] The top of the return air duct 6 bends at a right angle to the top of the heating space 2 in the horizontal direction. The return air inlet 5 is located above the two circulating air ducts 1. The bottom of the return air duct 6 extends vertically downward into the interior of the anti-corrosion shell 7. The bottoms of the two air inlet ducts 3 are both vertically downward. The tops of the two air inlet ducts 3 are both curved towards the combustion chamber. The tops of the two air inlet ducts 3 pass through the side wall of the heating space 2 and penetrate into the interior of the anti-corrosion shell 7.

[0026] This utility model offers various control methods during use, allowing for operation via either a controller or a manual switch. The main functions are the start-up and constant-temperature phases. During start-up, the two sets of high-pressure centrifugal fans are operated at maximum power. These fans then transport heated air, processed by the gas-air premixed burner, from the combustion chamber through the air inlet duct 3 into the heating space 2. The heated air is evenly distributed along the circulating air duct 1 to the bottom of the heating space 2, and then discharged into the heating space 2 through corresponding air outlets 4, heating and drying the interior of the heating space 2. The air in the heating space 2 then flows from the bottom... The air gradually rises upwards, reaching the top of the heating space 2, and returns to the combustion chamber through the return air duct 6 for reheating. It does not need to be discharged outdoors. After being heated in the combustion chamber, it re-enters the air inlet duct 3 for another heating cycle. After the air circulates in the combustion chamber and heating space 2, the power of the gas premixed burner is reduced, and the gas consumption is adjusted according to demand, thereby ensuring the energy-saving operation of the entire gas heating and drying equipment. In summary, this utility model has the advantages of fast heat diffusion speed, short heating time, low heat loss, dynamic energy-saving adjustment, uniform air distribution in the heating space, good shell corrosion resistance, and long service life.

[0027] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A high-efficiency and energy-saving dual-fan unit gas-fired heating and drying equipment, characterized in that: The system includes a dual-fan air supply system, a premixed gas burner, a circulating air duct (1), a combustion chamber, and a heating space (2). The dual-fan air supply system includes two sets of high-pressure centrifugal fans and an air inlet duct (3) connected to the corresponding high-pressure centrifugal fans. The high-pressure centrifugal fans and the combustion chamber are both located outside the heating space (2). The two sets of high-pressure centrifugal fans are connected to the interior of the combustion chamber. The high-pressure centrifugal fans deliver heated air from the combustion chamber to the interior of the heating space (2) through high-speed air supply. The premixed gas burner... The burner is installed on the combustion chamber. The circulating air duct (1) is located at the bottom of the heating space (2). The circulating air duct (1) is connected to the combustion chamber through two corresponding air inlet pipes (3). The circulating air duct (1) is provided with multiple air inlets (4) located at the bottom of the heating space (2). Heating air is injected into the combustion chamber through the air inlets (4). The combustion chamber is provided with a return air inlet (5) above it. The return air inlet (5) is connected to the interior of the combustion chamber through a return air pipe (6) located above the dual-fan unit air supply system.

2. The high-efficiency and energy-saving dual-fan unit gas heating and drying equipment according to claim 1, characterized in that: The high-pressure centrifugal fan and the combustion chamber are both equipped with anti-corrosion shells (7), which are assembled by multiple quick-release plates with double-layer sheet metal structure.

3. The high-efficiency and energy-saving dual-fan unit gas heating and drying equipment according to claim 2, characterized in that: The gas premixed burner is connected to a multi-hole injection flame stabilization mechanism, which is located on the inner wall of the combustion chamber and injects flames into the interior of the combustion chamber.

4. The high-efficiency and energy-saving dual-fan unit gas heating and drying equipment according to claim 3, characterized in that: The outer ring of the circulating air duct (1) is arranged around the bottom of the combustion chamber, and multiple air inlets (4) are evenly distributed in the part of the circulating air duct (1) surrounding the bottom of the combustion chamber. The diameter of the air inlets (4) is set according to the air volume and pressure to ensure that the temperature of each air inlet (4) is uniform.

5. The high-efficiency and energy-saving dual-fan unit gas heating and drying equipment according to claim 4, characterized in that: Each quick-release plate consists of an outer electrostatic powder coating layer, a middle rock wool filling layer, and an inner galvanized layer.

6. The high-efficiency and energy-saving dual-fan unit gas heating and drying equipment according to claim 5, characterized in that: The high-pressure centrifugal fan and the combustion chamber are both located inside the same anti-corrosion shell (7). The bottom of the anti-corrosion shell (7) is provided with multiple heat dissipation through holes (8) to facilitate heat dissipation inside the anti-corrosion shell (7). The heat dissipation through holes (8) are arranged in multiple rows and are evenly distributed around the bottom of the anti-corrosion shell (7). The bottom of the anti-corrosion shell (7) is supported by support legs (9).

7. The high-efficiency and energy-saving dual-fan unit gas heating and drying equipment according to claim 6, characterized in that: The top of the return air duct (6) bends at a right angle to the top of the heating space (2) in the horizontal direction. The return air inlet (5) is located above the two circulating air ducts (1). The bottom of the return air duct (6) extends vertically downward into the interior of the anti-corrosion shell (7). The bottoms of the two air inlet ducts (3) are both vertically downward. The tops of the two air inlet ducts (3) bend in an arc shape towards the combustion chamber. The tops of the two air inlet ducts (3) pass through the side wall of the heating space (2) and penetrate into the interior of the anti-corrosion shell (7).

8. The high-efficiency and energy-saving dual-fan unit gas heating and drying equipment according to claim 7, characterized in that: The circulating air duct (1) includes two air-spreading pipes (10) located at the outer ends of the two sides of the heating space (2), two support pipes (11) located on the inner side of the side, and three conveying pipes (12) connecting the air-spreading pipes (10) and the support pipes (11). The three conveying pipes (12) are all perpendicular to the air-spreading pipes (10) and the support pipes (11). Two of the conveying pipes (12) are located at the outer ends of the longitudinal direction of the heating space (2), and the remaining conveying pipe (12) is located in the middle of the heating space (2). The air-spreading ports (4) are all set on the inner side wall of the air-spreading pipes (10), and the multiple air-spreading ports (4) are evenly distributed along the horizontal direction on the corresponding air-spreading pipes (10).

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